Задача N5388 теория вероятностей доверительный интервал

5388. x̅=84.23, n=169, σ=13. Find confidence intervals for estimating the mathematical expectation a of a normal distribution with a reliability of 0.95, knowing the sample mean x̅=84.23, the sample size (number of observations) n=169, and the standard deviation σ=13.

Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)